High-pressure safety valve testing device and testing system for offshore drilling

Abstract

The utility model relates to a high-pressure safety valve testing device and system for offshore drilling, which comprises a base, a middle connecting piece, a nozzle connecting piece and a nozzle which are sequentially connected, a sealing pile is arranged between the base and the middle connecting piece for sealing, and a high-pressure sealing ring is arranged between the middle connecting piece and the nozzle connecting piece for sealing. The nozzle connecting piece and the nozzle are connected through a clamp flange and are matched with a sealing gasket for sealing; according to the safety valve testing device provided by the utility model, the structure of an existing testing device is improved, and the original mode of plane sealing through a sealing ring at a key connection position is changed into the mode of sealing through matching of the hard sealing element and the sealing ring; and high-quality sealing is realized by utilizing the interaction between the inclined contact surfaces and matching with the fastening and pressing of the fastener, so that the requirement of higher pressure test can be met. The whole testing device is high in reliability, convenient to install and maintain, good in universality and very high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valve testing devices, in particular to a high-pressure safety valve testing device and a testing system for offshore drilling. Background Art

[0002] High-pressure safety valves for offshore drilling require safety testing before use, such as Figure 11 The structure shown is an existing test device, which includes a nozzle part A, a first connecting part B and a second connecting part C, wherein the nozzle part and the first connecting part are connected to each other through a flange structure and a sealing ring is provided between the two for sealing, and the second connecting part is threadedly connected to the workbench through a threaded structure, and a sealing ring is also provided between the two for sealing.

[0003] The existing test device uses a sealing ring for plane sealing, which cannot meet the sealing requirements of the safety valve when performing higher pressure tests. In addition, a flange structure needs to be welded on the nozzle part during installation, which has low installation efficiency and high cost. Utility Model Content

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem that the test device in the prior art uses a sealing ring for plane sealing, which cannot meet the sealing requirements when the safety valve is subjected to higher pressure testing, and a flange structure needs to be welded on the nozzle part during installation, resulting in low installation efficiency and high cost.

[0005] In order to solve the above technical problems, the utility model provides a high-pressure safety valve testing device for offshore drilling, comprising:

[0006] A base, wherein an air inlet channel is formed on the base, wherein the two ends of the air inlet channel are respectively an air inlet end and an air outlet end, and a first step surface is coaxially provided on a section of the air inlet channel near the air outlet end, and the edge of the first step surface is chamfered to form a first sealing surface;

[0007] an intermediate connecting member, one end of which is connected to the base via a fastener, the intermediate connecting member being provided with a first central through hole coaxial with the air outlet end, and the first central through hole being provided with a second stepped surface proximate to the air outlet end, with a receiving position formed between the first stepped surface and the second stepped surface;

[0008] A sealing pile, which is a columnar structure and is coaxially arranged in the accommodating position. One end of the sealing pile is in contact with the second step surface, and the outer edge of the other end is chamfered to form a second sealing surface that is in close contact with the first sealing surface. A first sealing ring is sleeved on the sealing pile and is tightly pressed between the sealing pile and the inner wall of the first central through hole.

[0009] a nozzle connector, one end of which is connected to an end of the intermediate connector away from the base via a fastener, a second central through hole coaxial with the first central through hole being defined in the nozzle connector, a second sealing ring being disposed between the nozzle connector and the intermediate connector, and an opening of the second central through hole away from the intermediate connector being chamfered to form a third sealing surface;

[0010] a nozzle, one end of the nozzle being connected to the input end of the high-pressure safety valve, and the other end being connected to the end of the nozzle connector away from the intermediate connector via a clamp flange, and a third central through hole coaxial with the second central through hole being formed on the nozzle, and an orifice of the third central through hole near one end of the nozzle connector being chamfered to form a fourth sealing surface;

[0011] A sealing gasket is tightly pressed between the nozzle and the nozzle connector. The sealing gasket is dish-shaped and includes two conical surfaces symmetrically arranged at both ends. The two conical surfaces are tightly fitted with the third sealing surface and the fourth sealing surface respectively.

[0012] In one embodiment of the present invention, the clamp flange includes two plate-shaped hoop plates, and two groups of connecting hole groups are symmetrically arranged on the plate surface of the hoop plates, respectively close to the two ends thereof, and the connecting hole groups each include two connecting holes arranged at intervals in the width direction thereof, and a semicircular groove located between the two connecting hole groups is provided on one surface of the hoop plates, and an interlocking groove is provided on the bottom surface of the groove; the two hoop plates are connected together at the connecting holes by fasteners, and a clamping groove for clamping the nozzle and the nozzle connector together is formed between the interlocking grooves of the two hoop plates after connection.

[0013] In one embodiment of the present invention, a first annular clamping portion is coaxially arranged on the side of the nozzle connector away from one end of the intermediate connector, and a second annular clamping portion is arranged on the side of the nozzle away from one end of the high-pressure safety valve. The first clamping portion and the second clamping portion are clamped in the clamping groove to realize the connection between the nozzle connector and the nozzle.

[0014] In one embodiment of the present invention, both side surfaces of the fitting groove are inclined surfaces, and outer edges of the first clamping portion and the second clamping portion are both provided with inclined surfaces matching the side surfaces of the fitting groove.

[0015] In one embodiment of the present invention, at least two second sealing rings are coaxially arranged.

[0016] In one embodiment of the present invention, a plurality of annular grooves coaxial with the first central through hole are formed on the end surface of the intermediate connector at one end connected to the nozzle connector, and each of the second sealing rings is respectively disposed in each of the annular grooves.

[0017] In one embodiment of the present invention, both the first sealing ring and the second sealing ring are high-pressure sealing rings.

[0018] In one embodiment of the present invention, the sealing gasket is a metal gasket.

[0019] In an embodiment of the present invention, the sealing pile is made of metal.

[0020] A testing system comprises the high-pressure safety valve testing device for offshore drilling as described in any one of the above items.

[0021] The above technical solution of the utility model has the following advantages compared with the prior art:

[0022] The utility model discloses a high-pressure safety valve testing device and testing system for offshore drilling, comprising a base, an intermediate connecting piece, a sealing pile, a nozzle connecting piece, a nozzle and a sealing gasket; an air inlet channel is provided on the base, a first step surface is provided in the air inlet channel, and the edge chamfer of the first step surface forms a first sealing surface; one end of the intermediate connecting piece is connected to the base, a first central through hole is provided on the intermediate connecting piece and a second step surface is provided therein; the sealing pile is provided between the two step surfaces, one end of the sealing pile is fitted with the second step surface, and the outer edge chamfer of the other end forms a second sealing surface and is tightly fitted with the first sealing surface, and a first sealing ring is sleeved on the sealing pile; the nozzle connecting piece One end is connected to the intermediate connector, and a second central through hole is formed on the nozzle connector. A second sealing ring is provided between the nozzle connector and the intermediate connector, and a third sealing surface is formed by chamfering the opening of the second central through hole away from one end of the intermediate connector. One end of the nozzle is connected to the high-pressure safety valve, and the other end is connected to one end of the nozzle connector via a clamp flange. A third central through hole is formed on the nozzle, and a fourth sealing surface is formed by chamfering the opening of the third central through hole near one end of the nozzle connector. A sealing gasket is tightly pressed between the nozzle and the nozzle connector, and the sealing gasket includes two conical surfaces symmetrically arranged at its two ends, which are tightly fitted with the third sealing surface and the fourth sealing surface respectively. This safety valve test device improves the structure of the existing test device, replacing the original planar sealing method of the key connection position with a sealing ring with a hard seal in combination with the sealing ring. The interaction between the inclined contact surfaces and the tightening and compression of the fasteners are used to achieve high-quality sealing, thereby meeting the requirements of higher pressure testing. The entire test device has high reliability, is easy to install and maintain, has good versatility, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model and in conjunction with the accompanying drawings, wherein

[0024] Figure 1 This is a schematic diagram of the overall structure of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the present utility model;

[0025] Figure 2 yes Figure 1 An enlarged view of part A of a high-pressure safety valve testing device for offshore drilling is shown;

[0026] Figure 3 yes Figure 1 An enlarged view of part B of a high-pressure safety valve testing device for offshore drilling is shown;

[0027] Figure 4 This is a structural schematic diagram of the base of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the utility model;

[0028] Figure 5 This is a structural diagram of an intermediate connecting piece of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the present utility model;

[0029] Figure 6 Schematic diagram of the third sealing surface and the fourth sealing surface of the high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the present utility model;

[0030] Figure 7 This is a cross-sectional view of a sealing pile of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the present utility model;

[0031] Figure 8 This is a structural schematic diagram of a sealing gasket of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the present utility model;

[0032] Figure 9 This is a front view of a hoop plate of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the utility model;

[0033] Figure 10 This is a cross-sectional view of a hoop plate of a high-pressure safety valve testing device for offshore drilling according to a preferred embodiment of the present invention;

[0034] Figure 11 The present invention is a schematic structural diagram of a high-pressure safety valve testing device for offshore drilling in the prior art.

[0035] Explanation of the reference numerals in the specification: 1. Base; 11. Air inlet end; 12. Air outlet end; 13. First step surface; 14. First sealing surface; 2. Intermediate connecting piece; 21. Second step surface; 3. Sealing pile; 31. Second sealing surface; 4. First sealing ring; 5. Nozzle connecting piece; 51. Third sealing surface; 6. Second sealing ring; 7. Nozzle; 71. Fourth sealing surface; 8. Clamp flange; 81. Hoop plate; 811. Groove; 812. Fitting groove; 9. Sealing gasket; 91. Conical surface; A. Nozzle piece; B. First connecting piece; C. Second connecting piece. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. Example 1

[0037] Reference Figures 1-10 As shown, the utility model is a high-pressure safety valve testing device for offshore drilling, comprising:

[0038] The base 1 has an air inlet passage formed thereon, with an air inlet end 11 and an air outlet end 12 at either end. A first step surface 13 is coaxially provided on a section of the air inlet passage near the air outlet end 12, and the edges of the first step surface 13 are chamfered to form a first sealing surface 14.

[0039] An intermediate connector 2, one end of which is connected to the base 1 via a fastener. The intermediate connector 2 is provided with a first central through hole coaxial with the air outlet end 12, and a second stepped surface 21 is provided in the first central through hole near the air outlet end 12. A receiving space is formed between the first stepped surface 13 and the second stepped surface 21.

[0040] The sealing pile 3 is a columnar structure and is coaxially arranged in the accommodating position. One end of the sealing pile 3 is in contact with the second step surface 21, and the outer edge of the other end is chamfered to form a second sealing surface 31 that is in close contact with the first sealing surface 14. The sealing pile 3 is sleeved with a first sealing ring 4 that is tightly pressed between it and the inner wall of the first central through hole.

[0041] A nozzle connector 5, one end of which is connected to the end of the intermediate connector 2 away from the base 1 via a fastener. The nozzle connector 5 defines a second central through hole coaxial with the first central through hole, and a second sealing ring 6 is provided between the nozzle connector 5 and the intermediate connector 2. The opening of the second central through hole away from the intermediate connector 2 is chamfered to form a third sealing surface 51.

[0042] Nozzle 7, one end of which is connected to the input end of the high-pressure safety valve, and the other end of which is connected to the end of the nozzle connector 5 away from the intermediate connector 2 via a clamp flange 8. A third central through hole coaxial with the second central through hole is formed on the nozzle 7, and the opening of the third central through hole near the end of the nozzle connector 5 is chamfered to form a fourth sealing surface 71;

[0043] The sealing gasket 9 is tightly pressed between the nozzle 7 and the nozzle connector 5. The sealing gasket 9 is dish-shaped and includes two conical surfaces 91 symmetrically arranged at both ends. The two conical surfaces 91 are tightly fitted with the third sealing surface 51 and the fourth sealing surface 71 respectively.

[0044] Specifically, a receiving position is formed between the first step surface 13 and the second step surface 21, which spans the intermediate connector 2 and the base 1. The sealing pile 3 is coaxially arranged in the receiving position. By locking the fastener, the first sealing surface 14 and the second sealing surface 31 can be tightly fitted together. Moreover, since the first sealing surface 14 and the second sealing surface 31 are mutually matching inclined surfaces, when the fastener is further locked, the first sealing surface 14 and the second sealing surface 31 will be more tightly combined and the sealing effect will be better, thereby ensuring the sealing effect of the sealing pile 3 at one end of the base 1; and at the end close to the intermediate connector 2, sealing is achieved by arranging a first sealing ring 4 on the outer surface of the sealing pile 3.

[0045] The intermediate connector 2 and the nozzle connector 5 are sealed by coaxially arranging multiple second sealing rings 6;

[0046] The nozzle connector 5 and the nozzle 7 are connected together by a clamp flange 8. When the clamp flange 8 is locked, the third sealing surface 51 and the fourth sealing surface 71 will press the two conical surfaces 91 of the sealing gasket 9 to achieve sealing; and the contact surfaces of the clamp flange 8 and the nozzle connector 5 and the nozzle 7 are set to be inclined surfaces that match each other, further improving the combination effect of the third sealing surface 51 and the fourth sealing surface 71 when the clamp flange 8 is locked, thereby ensuring the sealing effect.

[0047] This utility model presents a high-pressure safety valve test device for offshore drilling. This improves upon the structure of existing test devices by replacing the existing planar sealing method at key connection points with a hard seal (i.e., a sealing pile 3 and a sealing gasket 9) in conjunction with the sealing ring. This utilizes the interaction between the inclined contact surfaces and the tightening and compression of the fasteners to achieve a high-quality seal, thus meeting the requirements of higher pressure testing. The entire test device boasts high reliability, easy installation and maintenance, excellent versatility, and high practicality.

[0048] Reference Figure 1 、 Figure 9 and Figure 10As shown, the clamp flange 8 further includes two plate-shaped hoop plates 81, each symmetrically provided with two groups of connection holes near its two ends. Each connection hole group includes two connection holes spaced apart in the width direction. A semicircular groove 811 is provided on one surface of the hoop plate 81, located between the two connection hole groups. A fitting groove 812 is provided on the bottom surface of the groove 811. The two hoop plates 81 are connected together at the connection holes by fasteners. After connection, a clamping groove for clamping the nozzle 7 and the nozzle connector 5 is formed between the fitting grooves 812 of the two hoop plates 81. Specifically, when the clamp flange 8 is connected, the two hoop plates 81 with the grooves 811 facing each other are stacked together by fasteners. A mounting space is formed between the two connected hoop plates 81 to accommodate the nozzle connector 5 and the end to be connected of the nozzle 7. The connecting portions (i.e., the first and second fitting portions) of the nozzle connector 5 and the nozzle 7 are clamped in the fitting grooves to achieve connection.

[0049] Furthermore, a first annular clamping portion is coaxially arranged on the side of the nozzle connector 5 away from the end of the intermediate connector 2, and a second annular clamping portion is arranged on the side of the nozzle 7 away from the end of the high-pressure safety valve. The first clamping portion and the second clamping portion are clamped in the clamping groove to realize the connection between the nozzle connector 5 and the nozzle 7.

[0050] Furthermore, both sides of the engaging groove 812 are inclined, and the outer edges of the first and second engaging portions are both provided with inclined surfaces that match the sides of the engaging groove 812. It is conceivable that when the fastener is tightened, the inclined surfaces between the engaging groove 812 and the first and second engaging portions cooperate to better integrate the nozzle connector 5 and nozzle 7 with the sealing gasket 9, ensuring a good seal.

[0051] Reference Figure 1 、 Figure 3 and Figure 5 As shown, further, at least two second sealing rings 6 are coaxially arranged, and the number can be increased or decreased according to actual conditions to ensure the sealing effect.

[0052] Furthermore, a plurality of annular grooves coaxial with the first central through hole are formed on the end surface of the intermediate connecting member 2 connected to the nozzle connecting member 5 , and each second sealing ring 6 is respectively disposed in each annular groove.

[0053] Furthermore, the first sealing ring 4 and the second sealing ring 6 are both high-pressure sealing rings.

[0054] Furthermore, the sealing gasket 9 is a metal gasket; a hard sealing gasket 9 has a longer service life and stability.

[0055] Furthermore, the sealing pile 3 is made of metal. Example 2

[0056] The utility model also discloses a testing system, which comprises the high-pressure safety valve testing device for offshore drilling as described in the first embodiment.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A high-pressure safety valve testing device for offshore drilling, characterized in that: include: A base, wherein an air inlet channel is formed on the base, wherein the two ends of the air inlet channel are respectively an air inlet end and an air outlet end, and a first step surface is coaxially provided on a section of the air inlet channel near the air outlet end, and the edge of the first step surface is chamfered to form a first sealing surface; an intermediate connecting member, one end of which is connected to the base via a fastener, the intermediate connecting member being provided with a first central through hole coaxial with the air outlet end, and the first central through hole being provided with a second stepped surface proximate to the air outlet end, with a receiving position formed between the first stepped surface and the second stepped surface; A sealing pile, which is a columnar structure and is coaxially arranged in the accommodating position. One end of the sealing pile is in contact with the second step surface, and the outer edge of the other end is chamfered to form a second sealing surface that is in close contact with the first sealing surface. A first sealing ring is sleeved on the sealing pile and is tightly pressed between the sealing pile and the inner wall of the first central through hole. a nozzle connector, one end of which is connected to an end of the intermediate connector away from the base via a fastener, a second central through hole coaxial with the first central through hole being defined in the nozzle connector, a second sealing ring being disposed between the nozzle connector and the intermediate connector, and an opening of the second central through hole away from the intermediate connector being chamfered to form a third sealing surface; a nozzle, one end of the nozzle being connected to the input end of the high-pressure safety valve, and the other end being connected to the end of the nozzle connector away from the intermediate connector via a clamp flange, and a third central through hole coaxial with the second central through hole being formed on the nozzle, and an orifice of the third central through hole near one end of the nozzle connector being chamfered to form a fourth sealing surface; A sealing gasket is tightly pressed between the nozzle and the nozzle connector. The sealing gasket is dish-shaped and includes two conical surfaces symmetrically arranged at both ends. The two conical surfaces are tightly fitted with the third sealing surface and the fourth sealing surface respectively.

2. The offshore drilling high-pressure safety valve testing device according to claim 1, characterized in that: The clamp flange includes two plate-shaped hoop plates, and two groups of connection holes are symmetrically arranged on the plate surface of the hoop plates, respectively close to the two ends thereof, and the connection hole groups each include two connection holes arranged at intervals in the width direction thereof, and a semicircular groove located between the two connection hole groups is provided on one surface of the hoop plates, and an engaging groove is provided on the bottom surface of the groove; the two hoop plates are connected together at the connection holes by fasteners, and a clamping groove for clamping the nozzle and the nozzle connector together is formed between the engaging grooves of the two connected hoop plates.

3. The offshore drilling high-pressure safety valve testing device according to claim 2, characterized in that: A first annular clamping portion is coaxially arranged on the side of the nozzle connector away from one end of the intermediate connector, and a second annular clamping portion is arranged on the side of the nozzle away from one end of the high-pressure safety valve. The first clamping portion and the second clamping portion are clamped in the clamping groove to realize the connection between the nozzle connector and the nozzle.

4. The high-pressure safety valve testing device for offshore drilling according to claim 3, characterized in that: Both side surfaces of the fitting groove are inclined surfaces, and outer edges of the first clamping portion and the second clamping portion are both provided with inclined surfaces matching the side surfaces of the fitting groove.

5. The offshore drilling high-pressure safety valve testing device according to claim 1, characterized in that: At least two second sealing rings are coaxially arranged.

6. The high-pressure safety valve testing device for offshore drilling according to claim 5, characterized in that: A plurality of annular grooves coaxial with the first central through hole are formed on the end surface of the intermediate connecting piece at one end connected to the nozzle connecting piece, and each of the second sealing rings is respectively arranged in each of the annular grooves.

7. The offshore drilling high-pressure safety valve testing device according to claim 1, characterized in that: The first sealing ring and the second sealing ring are both high-pressure sealing rings.

8. The offshore drilling high-pressure safety valve testing device according to claim 1, characterized in that: The sealing gasket is a metal gasket.

9. The high-pressure safety valve testing device for offshore drilling according to claim 1, characterized in that: The sealing pile is made of metal.

10. A testing system, characterized in that: It comprises the high-pressure safety valve testing device for offshore drilling according to any one of claims 1 to 9.

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